Air-compressor.



G. POLL.

AIR. COMPRE$SOR. APPLICATION FILED AUG;28,1907.

Patented Mar. 23, 1909.

"Inventor mm.

3 SHEETS-SHEBT 1..

G POLL AIR COMPRESSOR.

APPLIOATION FILED AUG.28, 1907.

3 SHEETS-SHEET 2.:

Patented Mar. 23, 1909.

Inventor SWMQAL G. POLL. AIR COMPRESSOR.

APPLIOATION FILED AUG. 28, 1907.

Patented Mar. 23, 1909.

3 SHEETS-SHEET 3.

Inventor MM Mk UNIT D s'rAiijrqs PATENT OFFICE.

GERALD FOLL, or wmnrrne, MANITOBA,- CANADA, ASSIGNOR or ONE-HALF TO JOSEPH YOUNG, OF WINNIPEG, CANADA.

AIR-COMPRESSOR.

Specification of Letters Patent,

Patented March 23, 1908.

mason M August as, 1907. Serial at. 390,496.

To all whom it may concern:

. Be it known that I, GERALD FOLL, of the city of Winnipeg, in the Province of Manitoba, Canada, machinist, have invented certain new and useful Improvements in Air- Compressors, of which the following is thespecification. i My invention relates to air compressors, and the object ofthe inventlon. 1s to provide a simple, highly efficient, three cylinder,

upright, doubleacting air compressor, which is evenly balanced and has little for its size has a large capacity.

It consists essentially in' a suitable set of upright supports or standards, a'set of three vertical water jacketed pivotally supported cylinders having peculiarly constructed inlet and outlet ports, a crank shaft carried by the su ports, pistons working in the cylinders and, 0 erated by the crank shaft, a common lead pipe, flexible hose or tubing connecting the cylinders with the lead pipe, the parts being arranged and conscribed.

structed as hereinafter more particularly de- Figure 1 is an end elevation of my compressor. Fig. 2' is atop lan view of the same' Fig. 3 is a rear si e view of the in-. vention. Fig. 4, is a vertical cross sectional view through one of the cylinders, the, section being taken in the lane as denoted by the line X X, Fig. 3. Fig. 5- is an enlarged detailed sectional view showing the manner in which the cylinders are supported.

In the drawings like characters of referfence indicate corresponding parts in each figure.

a lathe support form, having feet throu which the standard may be bolted to the floor,

' or any convenient base.

3 are cross plates between the standards,

being bolted at their ends at 3 to the standards, it being noted that the standards'are in cross section ofT form.

4, 5, are side brackets of a U-shape form, bolted at 5 to the ribs of the standards and toward the foot.

6 is -a crank shaft having the "eccentric pins 6 set at substantially 120, such crank shaft being carried in bearings 7, formed within the standards, the eccentric me be ing placed so that one is midway etwe'enjarring, and- 1, 2, are suitable standards, of practicalfl the supports, and theother two, one at each end beyond the supports.

8, 9, and 10 are the cylinders, all of which are identical in construction, and will be described more particularly in detail shortly, the present description simply being for the purpose of showing the manner in which the cylinders are supported. Each cylinder has centrally of its length and diametrically opposing, two lugs 11, formed thereon, and the lugs are bored out and threaded to receive a r'ass bearin 12.

The standar s have each a lower cross arm 13, the positions of which are horizontally in alinement with the brackets 4 and 5, the arms having, centrally between the legs of the standard, each a threaded opening to receive a screw 14, having=a square head 15, by which it may be adjusted by a wrench. "The other end of the screw is formed with a conical point 16 and the bearing 12 is bored out to receive the conical end of the screw.

17 are adjusting screws of the same form as that 14, such screws passing through threaded openings, respectively, centrally in the, brackets 4 and 5. The conical points of these screws pass into the bearings on' the c linder, directly opposite the bearings for t e screws 14.-

plates 3, to which t ey are secured, and have centrally, each, a cross opening-in 'an' enlargement 19, to, receive a threaded screw- 20, of the same form as those 14 and 17. These latter screws work in bearings 12 on the cylinder.

. To put' the cylinders in. osition, the two outer ones 8 and 10 are he d by the screws 14 and 17, which maybe adjusted to any desired ti htness in the bearings. The central cylind which are, as before described, adjustable.

21 is a combined. belt and fly wheel.

To avoid prolixity I will now describe in detail one of thee linders of the com ressor' and the piston, it being understood t at the others are exactly the same in form.

22 is the cylinder body, having at one side an enlargement 23, bored to form alongiof the cylinder.

25, 26, areathe cylinder heads, the crank end being 25. The heads are held to the er 9 is supported by the screws 20,

tudinal channel'24 for the complete length I the cylinder through the head.

cylinder body by screws 27 passing through t e head and into the body, therebeing four of these to each cylinder head.

28 are two annular rings, one at either end of the cylinder, havin an internal thread b. which the rings may e screwed on the cyl inder body at 29.

30 is an encircling casing around the cylinder, forming a water jacket, such casing being held in place by means of the annular rings 28, which are screwed down tightly on the edgesof the casing' 31 is the piston carrying the ordinary split rings, and 32 is the piston rod passing upwadly through the piston head at the crank en 34 is a stuffing box on the cylinder head, and 35 is a cap screwed over the stutfing bo'X allowing of an opening 37 for the reception of waste, carryin oil.

38 is a drip coc opening to the bottom of The cylinder heads are bored at 39 and 40, to receive brass valve caps 39 and 40 respectively. Those 39 have formed at their lower end a seat for the valve 41.

42 are the valve stems of the valve 41, such valve stems finding bearings in the spiders 43, and the cap screws 44, which screw into the valve caps 39. The latter cap screws have openings 44 to allow air to pass the valve.

45'is a spring between the top of the cap screw 44 and the pin 46 in the endof the valve stem, and serves to keep the valve normally tightly closed.

47 are inlet ports from the valve to the.

' cylinder, such ports being bored through the cylinder heads.

The valve ca s 40 are screwed into the cylinder heads, irectly above and below the I longitudinal channel or passageway 24, .and

49 are cap screws fitting the ends of the valve ca s.

50 are the exhaust valves and 51 the valve seats formed in the cylinder headsdirectly above and below the channel 24.

52 are the valve stems bearing in the spider 53, carried by the valve cap, and 54 50'.

are spiral springs encircling the valve stem between the spider and the pin 55, at the end of the stem. 7

'56 are the exhaust ports fromthe cylinder,

being bored through the cylinder head.

57 are flexible pipes, screwing at their one end {ac-the cylinder and openin into the channel 24, and connecting at t e1r other end with the lead pipe 58, to which they are secured by 2.1 elbow 59. There are, as will be seen in the drawings, three of these pipes,

and they form the leads for the compressed airwtrorn the cylinder. Each ipe 57 has located therein, near the cylin er, a valve 60, operating on a valve"seat 61 formed in the pipe. The valve stem 62 is carried by spiders 63 within the pipe.

64 is a drip or blow-o cock, at the end of 'the main lead pipe 59. The other end of the latter pipe is connected directly to a receivingrtank.

he piston rods 32 are fastened to the res ective eccentric pins 6 by means'of the or maryjournals 65. In order to thoroughly understand the invention I will now describe its operation The rotation of the crank shaft 6 reciprocates the pistons in the cylinders successively. The pivotal suspension of the cylinders by means of the screws allows of the rocking motion necessary to: accommodate the piston rod. On the down stroke of the )iston, air is drawn into the cylinders throng the upper valve 41, and the air in the cylinder forward of the piston is compressed and forced through the. lower valve 50, the channel 24, -and.the valve 60, to the main lead 58, from which it goes to the receiving tank. For the upward stroke of the piston the previously described valve motion is duplicated in the other set of valves, the air being drawn in through the lower valve 41, and the air on the rear side of the iston being compressed to the channel 24, t irough the upper valve 50. In this way it will be seen the'pistons are all double acting.

In referring to the drawings it will be noticed that the valves 50 are so placed that when one is forced open the other is closed so that there is no chance for the air to return to the iston chamber. The valve 60 simply is use(i as a safe guard, and makes the valve 50 more easily operated and more positive. It is necessary, to open the valve 60, that the pressure in the passageway or channel 24 become equal to or greater t an the pressure in the pipe 57, or in other words the valve prevents the pressure in the main lead, '1). 8., the back ressure from the air tank from coming direct y on the valves 50, such valves allowing absolutely no-back pressure in the cylinder. When using the machine the water jackets on the cylinders may be inter-connected, and any other portion of the machine which it may be found advisable to jacket may be water jacketed. I

66 are oil cups of any desirable form, feeding to the inside of the cylinder.

' Although I have not shown any packing strips between the cylinder head and the cylinder body, it will be understood that whatever is found to-be necessary may be used, and also that it may be used in any other places whereit may be deemed advisable.

What-I claim as my invention is:

1. An air compressor comprising a pair of uprights, a crank shaft carried at the upper end of said uprights, cross bars connecting the upper ends together, a U-shaped lracket secured on the outer side of-each upright, a I diametrically opposing a set of lugs inter- I i cross bar carried by each upright, cross bars between the bars connecting the uprights together, pivotal points carried by the U- shaped brackets and the last named cross bars and the cross bars carried by each u pright, oscillating cylinders carried by said pivotal points, pistons in said cylinders, and connecting means between the pistons and the crank shaft.

2. In a device of the class described the nally threaded to receive a brass bearing, an opposing set of conically pointed adjusting screws carried by the brackets and the standards, and an opposing set of conically pointed adjusting screws carried by the cross bars between the standards, each set of adjusting screws being adapted to engage with the hearings on the cylinders,.and reciprocating combination with the supporting standards spaced apart by cross being inter-connector by cross bars, the brackets to the outer side of the standards and the crank shaft supported by the standards, of an outer set of c linders and an inner cylinder, having centrally of their length and lates, the cross plates pistons within the cylinders operated by the crank shaft, said cylinders having oscillating movement as and for the purpose specified.

Signed at \Vinnipeg, in the Province of Manitoba, this 24th day of July 1907.

GERALD FOLL.

W'itnesses:

' Ms. M. TAPLEY, I

GERALD Rox'nnnen. 

